Psion
Adventurer
My solution
In my campaign, I have generic rules for handling skill modifier feats.
A feat that enhances two thematically related skills provides +2 to each.
A feat that enhances on skill in any situation provides a +3 (this is your skill focus)
A feat that enhances one skill in one situation provides a +4. This includes things like combat casting as well as things like Green Ronin's secret of spellcraft feat (provides +4 to spellcraft checks when researching spells) and my own improved feint feat (+4 bluff for feinting only).
All such bonuses are competance bonuses if the feat has no prerequisite (and thus do not stack with each other or certain class or magic abilities), or an unnamed bonus if the feat has a prerequisite. This preserves the value of such feats that are provided in books like OA and FRCS.
In my campaign, I have generic rules for handling skill modifier feats.
A feat that enhances two thematically related skills provides +2 to each.
A feat that enhances on skill in any situation provides a +3 (this is your skill focus)
A feat that enhances one skill in one situation provides a +4. This includes things like combat casting as well as things like Green Ronin's secret of spellcraft feat (provides +4 to spellcraft checks when researching spells) and my own improved feint feat (+4 bluff for feinting only).
All such bonuses are competance bonuses if the feat has no prerequisite (and thus do not stack with each other or certain class or magic abilities), or an unnamed bonus if the feat has a prerequisite. This preserves the value of such feats that are provided in books like OA and FRCS.